Dynamo-electric machinery.



PATBNTED APR'. '7, 1908.

Camif 1&0. 883,822. PATENT@ APR, 7, 1908. o, A, PAHs-ONS. DYNAMO.ELECTRIC MACHINERY( APPLICATION FILED APRn 23, 1906.

3 SHEETS-SHEET 2,

. 2. 'TATENTBD Amm 1303i No 88382 o. A. PARSONS,

DYNAMO ELECTRIC MAGBINBR?.

PPLIUATI N FILED P 23, l 0 A G A E 9 6 3 SEEETS-SHEBT 3.

` iro. 883,822.

UNITED srATEs PATENT oEEioE.

CHARLES ALGERNON PARSONS, F NEWCASTLE-UPON-TYNE, ENGLAND.

DYNAMO-ELECTRIC MACHINERY.

Specmcation of Letters Patent.

Patented April 7,' 190s.

Application filed April 23, 1906. Serial No. 313,300.

ofoany body "of conductors especially in the case in which theconductors are'large and consist of a number of strands each insulatedWith vnon-conducting covering, such as are used m surtace woundarmatures oi` thehigh speed type, working in conjunction withy steamturbines. l

The invention consists in providing metal of high thermal conductivitysuitably disposed relatively to the conductors whereby the heat israpidly transmitted from the conductors to the internal parts or theexternal surface of the part to be cooled. and thereby dissipated.

The invention as applied to the armature of a dynamo consists morespeci'licallyin placing` around on or transverselyT to the conductor orconductors of the armature a lappin of wires, sheet metal, ribbon,gauze,v

vor the 'ke ofhigh thermal conductivity, the

sectional area of such .metal being small relatively toI the crosssection ot the conductor but suiiicient to conduct the heat rapidly in-aradial direction to the internal or external parts of the armature or toboth internal and external parts.-

n The invention consists in yproviding a heat conducting A exterior ot tpath to the interior or to the e part to be cooled, by the use ofspecially woven tapes containing metal of high thermal conductivity soarranged as to allow of easy dis slilpation of heat without producingelectrica y conducting circuits in which eddy currents could beproduced.

i lapping and the arrangement of the conr The invention further consistsin forms of tape containing metal of high thermal con-l ductivityespecially ada ted for the purpose. The disposition of t 'sheat.conducting ductors is vsuch that good thermal -conductivityisassured between the lapping and the core or external surface or both ofthe armature, so as to allow of the easy transmission and dissipation oiheat and also iiisulatioii ofthe conductors. The sheet metal wire,ribbon or the like is .so arranged lthat it does not produce loss byeddy currents and.

maybe in one continuous winding extending the whole length of theconductor but insulated therefrom, or it may consist of short lengths ofspiral lapping or may be made in single loops or U--shapedpieces placedaround or by the side of vthe conductors; or in other cases flat piecesof suitable heat conducting metal may be placed between the conductors,these pieces of metal'beiiig in contact with or only lightly insulatedfrom the binding wire or brass end supports of the armature; orprojections may be cast or otherwise formed on the endsupports to act ina similar manner.

` Referring to the accompanying diagrammatic drawings which illustratethe application of the invention to the armature ot a.

dynamo, Figures l aiid`2 are respectively longitudinal and transversesectioiids showing one application of the invention. Figs. 3 and 4 aresimilar views where the conductors oi the armature form a double layerat the end of the core. Figs. 5 and 6 are a longitudinal and atransverse section respectively of another modification. Fig. 7 isanelevation artly'iii section of another modification. Figs. 8 and 9 area longitudinal and transverse section respectively of anothermodification. Figs. l0 and Il aresiniilar sections of a furtherniodiiication. Figs. 12 and 13 are longitudinal sections of other formsof my invention.

In the modification shown in Figs. l and 2 with cotton or other suitableinsulating material.

The outside of the 'composite conductor which lhas previously beeneavily insulated with cotton or other insulating material, li, is lappedwith thin copper wire', c, the pitch of vthe armature conductors, c, areyinsulated the la ping being abouti/50 to 1/20th of an inc andpreferably in sections about 4 long with short 'ga ,s between them. The

`conductors a, thus' apped lie on the core, d,

ofthe armature which has'been previously insulated. with' tape-andvarnish or in any other suitable way, 'care beine taken that theinsulation between the conductors and the mature and from one another.

In the arrangement shown in Fig. 7 the lapping is in the form ot a tape,g, into which metal 1 is-woven lon itudinally, the tapes being wounddiagonal y round the conductors so that the metal in the tapes forms aradial path for heat generated in the conductors.

Instead of the lapping above described, any suitable arrangement of heatconducting metal serving the samepurpose maybe used; it is Yfoundpreferable, however, to use specially woven tapes. In forming thesetapes according to the form illustrated in Figs. 8 and 9 a tape is Wovenas warps, metal strips 1 of high thermal conductivity held together bywefts 2 of cotton or other suitable material.

The metal strips forming the Warps may be discontinuous in thelongitudinal direction the breaks 3 in one stri being oppositecontinuous parts of' the adiacent str1ps so that the tape is continuousas a fabric but does not aiiord a continuous electrically conductingpath.

According to the modification illustrated in Fig. 12 the metal strips 1are Woven length- Wise in a tape having cotton or like Warp's 4 heldtogether by Wefts 5 which may be small in number and of much nermaterial so that the copper stri s remain practically straight and arebare or nearly the Whole of their length and are thus'specially suitablefor providing a heat conducting ath throughthe points of contact oftapes sipped-round ad- 'y jacent conductors and lying .one across theother. In this modification also the metal may be discontinuouslongitudinally as shown in Fig. 13 While the tape itself is continuousand the breaks in the metal may be opposite one another or the breakinone stri may be opposite the continuous part of adI gucent ones.

vl`he metal 1 in the tapes maybe' in theol wire or circular as shown inFig. 9 or other section. y

it will be seen that by the use of tapes as beve described in which themetal is discontinuous there will be less danger of productionkoi eddycurrents than in the case of tapes ail'ording a continuous electricallyconducting path throughout their length. Tapes Woven With continuousWireas shown in Figs.

,sea

19 de 12 may however be used provided they are so placed relatively tothe cond uctors of the part to be cooled to avoid the 'formation of.closed circuits in which' eddy currents might be produced.'

It desired as shown in 7 thin strips of heat conducting metal 7 may becalked in grooves 6 around the core or end rings or other internal orexternal parts of the appliance to be cooled.

I do not Wish to be understood as limiting my invention to the detailsof construction herein shown and described as I have merely illustratedand described convenient embodiments of my invention, which may bevaried Widelyv Within the range of ordinary skill without departing fromthe spirit of my invention.

It will be obvious that the invention is aplicable to all forms ofelectrical machinery m which coils of conductors 'are liable to heatingand that the heat conducting metal above described may be used eitheralone orl in connection with radiating or other cooling aplianceswhereby the heat led to the surface liy the specially provided metal maybe dissipated; for instance, on transformers the metal lapping abovedescribed may be at tached to radiators or project and be cooled by air,Water, oil or other fluid circulation in any suitable manner.

I consider any and all suoli applications of my novel devices andcombinations herein set forth to be Within the scope of my invention.

By means of the invention much thicker coils can be used than have beenheretofore practicable'and a greater mass of copper used in a givenspace, ora greater current density used in a given mass of copper.

Having now particularly described and ascertained the nature of my saidinvention and .in what manner the same is to be performed I declare thatwhat I claim is 1. In electrical appliances comprising a number ofelectric conductors .'m proximity to each other, means for cooling saidcondoctors, consisting in metal strips lapped round said conductors, andso disposed as to form a heat conductinff path from the interior of thebody of conductors as and for the purposes described.

2. In electrical a pliances comprising a body of electric con( uctors inproximity to ductors, consisting in 'metal strips of small ductors asarid for the purposes described.

' the interior ci the body ci coiiductorc, es and `.tween saidconductors and in thermal cori section relatively to that ci the colapped round said conductors, all posed ae to form a heat conductingpath freni for the purposes described,

In electrical appliaiicee., a tape consisting of 'metal strips of high'thermal conduc tivity'voveii into a fabric said tapebeiscg of hightherriial conductivity and electrically filiecoritiiuoue, as and for thcpurposes clescribed. l

5. lu electrical appliances eompiisiiig e. number of electricalconductors iii proximity to each other, a la ing of tape containingcti'ipc of metal o' higli thermal conductivity, iiiterposed between Saidconductors, as-aiid for the purposes described.

6. lii'dynairio electric machinery, an 'ar- Biature, including a numberof conductors Wound on a core, and metal of high thermal conductivityinterposed between said ccn- 7. In dynamo electric machinery, ariarmature, including a number of conductorel Wound ori a core, andclapping' of mctalo high thermal conductivity interposed between saidconductors, as and 'for vthe purposes described. i

8. ln electrical appliances comprising a body oli' elect ficalconductors on a core,vmetai ci high thermal conductivity interposed betei. uiiace ci the body/"ol: conductors, and i themialconriectiori withsaid. core, and

ici' the purpose described.

lG. lin electrical appliances comprising a solid metal body iiiproxiiriity to a body' ci electrical. cciiductos, a pluralityv ci'strips of metal-cf ,gli thermal .conductivity calked iii said eoliemetal body, arid metal of high thermal conductivity interposed. betweenelectrical conductors Said metal being iii thermal cciiriecticii withsaid strips, as and for the purposes described,

il. 'n electrical appliancea a tape consisting ci metal. strips of; highthermal conductivity., Woven. with other material into a ab ric,saidiiietal strips being discontinuous loriM gitudiialiy while the tapeis continuous, as and for the purposes described.

in tectiiiioiiywhereoi i have signed my name to this speciiicatioii inthe presence ci two subscribing; Witnesses.

CHARLES ALGERN il SSQE'S.

.lliitiieesee timmer GRAHAM illimite, Jr., Fieamiiiicii Goebel@ Hm.'Blenheim..

